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Finding the Fourth Proportional to 286,628.20, 429,942.30 and 76,287.40

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Solution

The fourth proportional to 286,628.20, 429,942.30 and 76,287.40 is: 114,431.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,628.20 : 429,942.30 = 76,287.40 : x
  2. Step 2: Convert to fraction form
    286,628.20/429,942.30 = 76,287.40/x
  3. Step 3: Cross multiply
    286,628.20x = 429,942.30 × 76,287.40
  4. Step 4: Simplify right side
    286,628.20x = 32,799,180,217.02
  5. Step 5: Solve for x
    x = 32,799,180,217.02/286,628.20
  6. Step 6: Final answer
    x = 114,431.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.